Novarupta [a] is a volcano that was formed in 1912, located on the Alaska Peninsula on a slope of Trident Volcano in Katmai National Park and Preserve, about 290 miles (470 km) southwest of Anchorage. Formed during the largest volcanic eruption of the 20th century, Novarupta released 30 times the volume of magma of the 1980 eruption of Mount St ...

Novarupta, volcanic vent and lava dome, southern Alaska, U.S., located at an elevation of 841 metres (2,759 feet) within Katmai National Park and Preserve. Its violent eruption, which began on June 6, 1912, and lasted 60 hours, is considered the largest volcanic eruption of the 20th century.

On June 6th, 1912, a tremendous blast sent a large cloud of volcanic ash skyward, and the eruption of the century was underway. People in Juneau, Alaska, about 750 miles from the volcano, heard the sound of the blast – over one hour after it occurred.

The Plinian style eruption at Novarupta on June 6-8, 1912 was the world’s largest volcanic eruption of the 20th century and one of the five largest in recorded history. No volcanic eruption since Tambora in 1815 has surpassed it.

Jan 31, 2017 · The world's largest eruption of the 20th century occurred in 1912 at Novarupta on the Alaska Peninsula. An estimated 15 cubic kilometers of magma was explosively erupted during 60 hours beginning on June 6th. There are many historic reports of ashfall from the eruption in the Pacific Northwest.

May 17, 2012 · Novarupta's explosive eruption on June 6–9, 1912, expelled 13–14 cubic kilometers (3.1–3.4 cubic miles) of magma, the second largest in recorded history. The eruption quickly formed a massive ash column that rose more than 30 km (19 mi) high and spread as an enormous umbrella cloud 1,600 km (1,000 mi) wide.

Novarupta, the least topographically prominent volcano in the Katmai area, was formed during a major eruption in 1912. This eruption was the world's largest during the 20th century and produced a voluminous rhyolitic airfall tephra and the renowned Valley of Ten Thousand Smokes (VTTS) ash flow.

Nearby, the expedition discovered a newly formed lava dome they called 'Novarupta' and huge flows of volcanic ash filling what they named the 'Valley of Ten Thousand Smokes' for the numerous plumes of steam rising from the still hot ground.

Mar 18, 2022 · Prominent scarps along the flanks of Baked, Falling, and Broken Mountains surrounding the Novarupta depression indicate considerable subsidence occurred following the 1912 eruption. Nearby stratovolcanoes (including Trident and Katmai) form a volcanic front trending N65E; Novarupta lies about 4 km behind the front.

Lasting three days, the largest volcanic eruption of the twentieth century exploded June 6, 1912, from a new volcano, Novarupta. In the process, it created Katmai caldera and the Valley of Ten Thousand Smokes.